Classifications

• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
  • E21B7/00—Special methods or apparatus for drilling
  • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes
  • E21B7/205—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes without earth removal
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
  • F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
  • F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
  • F16L1/032—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being continuous

Definitions

• the present invention relates to a method for construction of a pipe through a fill of loosely packed materials, where the pipe is installed between the pointed front section and the rear section of a tool, and the rear section is subjected to a drive force in the longitudinal direction, so that the pointed section and the pipe is pushed into the loosely packed materials, as stated in the preamble of claim 1.
• the invention also relates to a tool for bringing about drilling through a fill of loosely packed materials.
• the invention specifically relates to a tool that can be connected to a pipe to be laid through the fill, where the pipe is used for either leading fluids such as gas and liquids, such as water, sewer, combustible gasses and so forth, or the pipe is to be used for laying cables of different types.
• the expression fill is meant to encompass a mound of loosely packed materials for the construction of roads, the layout of railroad lines, and so forth. Loosely packed materials encompass a detritus or gravel volume that can be made up of a combination of everything from fine grained sand to coarse ballast and stones.
• the invention relates to the above mentioned method, which comprise of drilling through the fill without the need to break up the top layer.
• drilling through the fill without the need to break up the top layer.
• boulders therein may not be penetrated by drilling tools. In such instances it may be that both the point and the elements it pulls must be left behind in the fill.
• One object of the present invention is to bring forth a solution for handling a situation where it turns out that the point cannot be guided all the way through the fill due to an inadvertent hindrance in the fill.
• the method for laying pipe through a fill of loosely compacted materials is characterized by that in the event that the progress is stopped due to an inadvertent hindrance in the loosely packed materials, the tool and the pipe connected thereto is pulled back by exerting a tractive force on a tractive means connected to the pointed front section.
• a retractile means such as a line connected to the front section is utilized, and the line runs within the pipe connected to the rear section, and the retractile force is controlled by the tool operator.
• a line such as a wire or a chain, or a combination of these, is used.
• the tool is characterized by comprising a means connected to the pointed front tool section, and means to exert a tractive force on said means, in order to, in the event that the progress is halted due to an inadvertent hindrance in the fill, retracting and removing pipes and tools from the fill.
• the method and tool according to the present invention is used to bring about a boring through the fill, and particularly to locate pipes through a fill, which is used to lead fluids such as gas and liquid, for example water, sewer, combustible gasses and so forth, or the pipe is used to lay cables of different types.
• a wire 36 is used, which is arranged in coils, in order to anchor the rig to the point where the pipe is to be inserted into the fill. Further, the US-patent states that this wire is also used to retract the rig from the construction zone, and thus pull out the entire pipe construction of screwed together pipe part sections, when there is an impassable hindrance in the fill. This solution can however not prevent pipe parts from coming loose from each other inside the fill during the retraction.
• the present invention comprises a further development of the objects of the US patent, by locating the fastening point of the wire at the end of the pipe assembly, by point 32.
• the 5. present invention has considerable benefits.
• Figure 1 shows a road fill that is drilled through transversely, where a pipe is positioned.
• Figure 2 shows a perspective drawing of the two parts of a tool according to the present0 invention.
• Figure 3 shows how a pipe is mounted to the two tool parts according to the present invention.
• Figures 4 and 5 outline how a pipe divided into sections is mounted to the tool, in cases where the pipe is relatively long.
• 5 Figure 6 shows more detailed how a chain comprises line 80 and is connected to the parts.
• the median of the road is shown at 11.
• a steel pipe 20 (or of a different metal) of the types mentioned earlier runs through the fill.
• pipe 20 is ⁇ continued as hose 22 continuing on to a not shown area.
• the invention relates to a method and an apparatus for leading the pipe through the road fill.0
• the apparatus 30 has two parts, a front end 32 and a rear end 50 as drawn on figure 2.
• the tow parts 32, 34 have a cylindrical shape.
• the front end 32 forms a pointed front part 36 with point 38.
• the front end 32 has a rear cylindrical massive tap shape 40.
• the tap 40 is constructed to receive the front end 42 of a pipe 20, which is threaded onto tap 40.
• the outer diameter of tap 40 approximately corresponds to the inner diameter of pipe5 20.
• a ring shaped flange 44 with a "height" corresponding to the thickness of the wall of the pipe is formed by the transition to front end 32.
• Pipe 20 is introduced onto tap 40 so that the pipe end 42 will but up against flange 44.
• Pipe 20 preferably comprises internal threads, and is screwed onto the outside thread tap 40.
• the tap threads are given by 43 on figure 2.
• the rear end 50 of the apparatus comprises a corresponding forward cylindrical massive tap0 shape 52.
• the tap 52 is oriented to receive the rear end 46 of a pipe 20 that is threaded onto tap 40.
• the outer diameter of tap 40 corresponds approximately to the inner diameter of pipe 20, such that the pipe can be pressed onto the rear end of the apparatus (a press fit).
• the rear end 50 is fastened to the pipe with a screw connection. 5
• the rear end 54 forms a hollow space 56 for mounting a rotary percussion drill 58, shown schematically by arrow 62.
• the rotary percussion drill 62 which is not closer shown herein, comprises a hydraulic tool for chiseling rocks, and is used to transfer powerful strikes with high frequency against the rear end 50, and the energy is transferred by the massive pipe 20 to the front end 36.
• FIGS 3 and 4 draw schematically the fill 12 and the over laying road 10, that is not to be influenced by laying the pipe through the fill.
• Around front end 36 there is schematically shown stones 70 in fill material 12, which is influenced by the strikes.
• the pipe is thus pushed inwards with the front end in the front.
• the pipe 20 is left passing through the fill, and may also be utilized for laying (as a draw pipe) conducts and cables of all imaginable types and purposes.
• FIG. 6 it is drawn how the tool is equipped with a pull line 80, for the instances where there is an inadvertent hindrance that makes it so one cannot manage to strike the pipe and the point through the fill.
• the pull line is fastened to the pointy front end 32 by point 72, and can comprise a wire or a chain, or a combination of wire and chain. It stretches backwards through the pipe parts 20 and backwards to the rear tool part where the operator may carry out a controlled retraction by pulling on the line. This retraction is preferably carried out by machinery. During such an operation with retraction, it is important that the parts do not come loose from each other internally, which may lead to that the pipe parts may become wedged stuck in the fill, and become impossible to remove.
• the wire must be kept very taut during the retraction. At the same time this tautness is ensured by connecting the wire/chain at the very front of the tip 32.
• the wire/chain-links are mounted with a in advance sufficient tautness, so that the pipe parts cannot fall apart and get wedged in the loose matter during the retraction.
• Figure 6 show in more detail how the chain comprises line 80, and is connected to the parts. It is clear that a pipe that is mounted in between the two parts of the tool cannot be too long before one risks the formation of deformations as a result of the high frequency strikes. Thus, it is possible to divide the process into more steps, by starting with a smaller pipe 2OA that is struck into the fill until it has gotten so far in as suggested on figure 4. Then a next pipe length 20b is connected to the first pipe length 2OA, and the rotary percussion drilling continues. The joint is shown by 64 on figure 4. In such a manner new pipe sections are continually added to the prior one until one has gotten through the fill.
• the pipe sections may for instance be connected by a screw connection, as is well known in the field.
• the tool according to the present invention is constructed of steel, with a quality that makes it so they can withstand large loads from the rotary percussion drilling as described above.
• the area around the tip is especially hardened in order to withstand powerful strikes against stones without incurring damage. This should be so to both crush the stones and push them aside during the progression and lying of the pipe through the fill materials.
• the mounting of the two tools with the pipe mounted in between is mounted to a rig or a framing that places the pointed front end against the fill volume to be penetrated.
• the pipe in order to bring forth a clean boring 63 through the fill, and then retract the pipe, by using the technique as mentioned, especially in connection with figure 6. This may occur if the fill volume consists of a more compact mass, with a more fine grained consistency, so that stabile inner walls are formed in the drilled hole 63.
• the big advantage of this invention is that the tool can be operated with standard construction equipment that comprises a rotary percussion unit, as is available at most construction sites, and that is easy to get hold of when an procedure for laying pipe through a already existing fill arises, without damaging or breaking the "sensitive" road surface.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Mining & Mineral Resources (AREA)
• Environmental & Geological Engineering (AREA)
• Fluid Mechanics (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Excavating Of Shafts Or Tunnels (AREA)
• Paper (AREA)
• Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Applications Claiming Priority (3)

Publications (2)

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• 2008
  • 2008-10-23 NO NO20084483A patent/NO334195B1/no unknown
  • 2008-11-20 WO PCT/NO2008/000414 patent/WO2009067024A1/en not_active Ceased
  • 2008-11-20 EA EA201000831A patent/EA017789B1/ru not_active IP Right Cessation
  • 2008-11-20 CA CA2704606A patent/CA2704606A1/en not_active Abandoned
  • 2008-11-20 EP EP08851104.3A patent/EP2222992A4/de not_active Withdrawn
  • 2008-11-20 US US12/734,519 patent/US8596915B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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